All 4 Uses

focus
in
A Living Nightmare - Cirque Du Freak book 1
(Auto-generated)

With that worry off my mind, I could focus on Steve and my real problem: whether to reveal the truth or not.†
Chpt 23 *
Steve's eyes shot open suddenly and focused on me and Mr. Crepsley.†
Chpt 26
My eyes were focused on Alan.†
Chpt 27
As she was bending over, my eyes focused on the curve of her neck, and suddenly my mouth went dry.†
Chpt 28

Definitions:

(1) (focus as in: Turn your focus to question #2.)
to direct attention or effort toward a single thing; or the ability to do so without getting distracted
(2) (focus as in: The focus of our study is...)
where attention is concentrated or directed
(3) (focus as in: bring into focus; or out of focus)
a state where something has come into view or can be seen clearly; or an adjustment made to permit a clear view
(4) (focus as with technical usage)
technical usage typically involves some sense of center or concentration such as:
- physics — a point where things come together such as the point where light rays meet
- geometry — a fixed reference point (as of a parabola)
- geology — the point of origin of an earthquake
See a comprehensive dictionary for other less common meanings.
(5) (meaning too rare to warrant focus)